gdb and binutils branch master updated. 6d451942486ca4125c48b1f10fdd5d619d6a532c

[kevinb at sourceware dot org]

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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=6d451942486ca4125c48b1f10fdd5d619d6a532c

commit 6d451942486ca4125c48b1f10fdd5d619d6a532c
Author: Kevin Buettner <kevinb@redhat.com>
Date:   Tue Feb 25 00:32:45 2014 -0700

    Use 16-bit integer type for rl78 register pairs.
    
    This patch changes rl78-tdep.c so that a 16-bit type is used for
    register pairs instead of a pointer type as was previously the case.
    This will cause these register pairs to be displayed as integers
    instead of as a data address with a 0xf0000 ORed in.
    
    E.g. registers ax, bc, de, and hl might now be displayed like this:
    
        (gdb) info registers ax bc de hl
        ax             0x6      6
        bc             0x0      0
        de             0x10c3   4291
        hl             0x108d   423
    
    Whereas, before, they were displayed as follows:
    
        (gdb) info registers ax bc de hl
        ax             0xf0006  0xf0006
        bc             0xf0000  0xf0000
        de             0xf10c3  0xf10c3
        hl             0xf108d  0xf108d
    
    These pairs are 16 bit quantities and should be displayed as such.
    This change also affects the way that the banked register pairs are
    displayed.  Within GDB, the banked register pairs are named bank0_rp0,
    bank0_rp1, .., bank3_rp2, bank3_rp3.
    
    However, these register pairs need to be used as addresses in DWARF
    expressions.  I have added 16 pseudo registers corresponding to banked
    register pairs.  These new pseudo registers are all hidden from the
    user and have a pointer type.  Values from these registers are
    intended to be used in DWARF expressions.  Therefore,
    rl78_dwarf_reg_to_regnum() has been adjusted to return these new
    pseudo register numbers.
    
    I had a much simpler patch which only changed the types, but it showed
    a number of regressions due to integer values from the banked register
    pairs being used as part of an address expression.  This current patch
    shows no regressions and now displays values of register pairs
    correctly.
    
    	* rl78-tdep.c ( RL78_BANK0_RP0_PTR_REGNUM, RL78_BANK0_RP1_PTR_REGNUM)
    	(RL78_BANK0_RP2_PTR_REGNUM, RL78_BANK0_RP3_PTR_REGNUM)
    	(RL78_BANK1_RP0_PTR_REGNUM, RL78_BANK1_RP1_PTR_REGNUM)
    	(RL78_BANK1_RP2_PTR_REGNUM, RL78_BANK1_RP3_PTR_REGNUM)
    	(RL78_BANK2_RP0_PTR_REGNUM, RL78_BANK2_RP1_PTR_REGNUM)
    	(RL78_BANK2_RP2_PTR_REGNUM, RL78_BANK2_RP3_PTR_REGNUM)
    	(RL78_BANK3_RP0_PTR_REGNUM, RL78_BANK3_RP1_PTR_REGNUM)
    	(RL78_BANK3_RP2_PTR_REGNUM, RL78_BANK3_RP3_PTR_REGNUM):
    	New constants.
    	(rl78_register_type): Use a data pointer type for SP and
    	new pseudo registers mentioned above.  Use a 16 bit integer
    	type for all other register pairs.
    	(rl78_register_name, rl78_g10_register_name): Update for
    	new pseudo registers.
    	(rl78_pseudo_register_read): Likewise.
    	(rl78_pseudo_register_write): Likewise.
    	(rl78_dwarf_reg_to_regnum): Return register numbers representing
    	to the newly added pseudo registers.

-----------------------------------------------------------------------

Summary of changes:
 gdb/ChangeLog   |   21 +++++++++++++++++
 gdb/rl78-tdep.c |   67 ++++++++++++++++++++++++++++++++++++++++++++++++++-----
 2 files changed, 82 insertions(+), 6 deletions(-)


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